Thanks for the fantastic experience. Recently I had to renew my ID (Personalausweis). I made an appointment through the web interface, showed up exactly on time, and was served 30 seconds after I had entered the waiting room!
Very friendly staff, who knew what they were doing. I was in and out in less than 20 minutes. I could hardly believe when only three weeks later I got a notification letter that my new ID is ready for pickup.
What a great example of German efficiency. Great job!